PHP数组合并：不是数组吗？

Question

I'm tryin to merge an array that I have when it is being created through a function

I have a function, and it returns an array.

class myarray
{
 public function getAr($id)
   {
      // mysql query
      while($dd= $database->fetch(PDO::FETCH_ASSOC))
           {
               $data[] = $dd; //there's values in the array when its being populated through the function of the while loop
           }
               return $data;
   }
 public function get3($id)
   {
      // mysl query
      while($dd= $database->fetch(PDO::FETCH_ASSOC))
           {
               $data[] = $dd; //there's values in the array when its being populated through the function of the while loop
           }
               return $data;
   }    
}

How come I tried to merge together the array:

$get = new myarray();

while($row = $fet->fetch(PDO::FETCH_ASSOC))
{
    $arrayAr = $get->getAr($id);
    $array3 = $get->get3($id);
    $new_array = array_merge($arrayAr ,$array3); //this gives me the error
    print_r($arrayAr); //displays array
}
    print_r($arrayAr); //displays nothing, why is that?

It says that its not an array?

array_merge() [function.array-merge]: Argument #1 is not an array 

But I can print_r($arrayAr); and its like an array inside the while loop, but it doesn't display anything outside of it?

when I tried this...

$new_array = array_merge((array)$arrayAr ,(array)$array3);

It doesn't display an error, but it isn't merged either.

Help?

Thanks

Answer 1

You $arrayAr is local variable and 2nd print_r() is used beyond of scope of his variable. If you need it available wider, "declare" it before foreach , with ie $arrayAr = array(); (or whatever value you want - it is not important in this case, yet array() makes code clear).